An Ontario police chief says the Toronto woman arrested by his force and accused of three murders in three days can be considered “a serial killer” after seemingly unrelated deaths were reported in Toronto, Niagara Falls and Hamilton.

On Friday, three Ontario police forces announced they had charged a 30-year-old Toronto woman with murder after two men and a woman were found dead over three days in different cities.

Police officers in the three southern Ontario cities have all been investigating suspected homicides this week, leading them to conclude the same Toronto woman may be behind the three killings in three days.

“I think by definition she is a serial killer — two or more offences,” Niagara Regional Police Chief Bill Fordy told reporters on Friday.

Niagara and Hamilton police have laid first-degree murder charges connected to killings they believe were random, while Toronto police homicide detectives are charging the same woman with the second-degree murder of someone they believe she knew.

The first incident occurred in Toronto, near Keele and Dundas streets, just after 2 p.m. on Tuesday, Oct. 1. Police said they found a still-unidentified woman dead in a home with signs of trauma on her body.

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The next day, before 3 p.m., police say they were called to John Allan Park in Niagara Falls after reports of a disturbance. Officers found a man suffering critical injuries who, despite the attempts of first responders, died at the scene.

Officers with Niagara police identified the man as 47-year-old Lance Cunningham.

And then, on Thursday, Oct. 3, Hamilton police rushed to a parking lot off MacNab Street North, where they found an unresponsive male victim who had been stabbed. Police said he was taken to hospital, where he died.

The Hamilton stabbing victim was identified by police as 77-year-old Mario Bilich.

Investigators with Toronto police said the detectives’ working understanding was that the Toronto victim was known to the woman, while the two other deaths were believed to be “randomly targeted.”

Toronto police said detectives involved were able to “link the homicide” in Hamilton with the death in Niagara Falls.

“An additional link was made to the active homicide investigation from October 1 in Toronto,” the force said.

The accused was identified as Sabrina Kauldhar, a  30-year-old woman from Toronto. She faces a second-degree murder charge in Toronto and a first-degree murder charge each from Niagara Regional Police and Hamilton police.

She is in the custody of Niagara Regional Police and was arrested in Burlington, Ont.

“This remains an ongoing investigation by Homicide detectives; as they continue to determine the timeline of events,” Toronto police said.

Anyone with information is asked to contact police. Officers said they are particularly concerned with anyone who may have seen Kauldhar between Oct. 1 and her arrest just before 6 p.m. on Oct. 3.

Niagara police also said they are looking to identify a woman seen at a Giant Tiger location in Burlington buying clothes Kauldhar apparently had when she was arrested.

Police are attempting to identify a female who was observed on CCTV footage on October 1 at the Giant Tiger located at 2025 Guelph Line in Burlington buying clothing.

Police are attempting to identify a female who was observed on CCTV footage on October 1 at the Giant Tiger located at 2025 Guelph Line in Burlington buying clothing.

NRP / Handout